scholarly journals Opacity-modulating triangular textures for irregular surfaces

2002 ◽  
Author(s):  
P. Rheingans
Keyword(s):  
Irregular Surfaces ◽  
Triangular Textures

Depth migration from irregular surfaces with depth extrapolation methods

Geophysics ◽  
1991 ◽  
Vol 56 (1) ◽  
pp. 119-122 ◽  
Author(s):  
Moshe Reshef
Keyword(s):  
Wave Equation ◽  
Surface Topography ◽  
Time Shift ◽  
Extrapolation Methods ◽  
Irregular Surfaces ◽  
Depth Migration ◽  
Numerical Problem ◽  
Flat Interface ◽  
Interface Wave ◽  
Computationally Expensive

Nonflat surface topography introduces a numerical problem for migration algorithms that are based on depth extrapolation. Since the numerically efficient migration schemes start at a flat interface, wave‐equation datuming is required (Berryhill, 1979) prior to the migration. The computationally expensive datuming procedure is often replaced by a simple time shift for the elevation to datum correction. For nonvertically traveling energy this correction is inaccurate. Subsequent migration wrongly positions the reflectors in depth.

Self-adhesive and contractile silk fibroin/graphene nano-ionotronic skin for strain sensing of irregular surfaces

2021 ◽  
Author(s):  
Shaojun Dong ◽  
Yuehua Zhang ◽  
Bin Li ◽  
Jing Ren ◽  
Shengjie Ling ◽  
...  
Keyword(s):  
Silk Fibroin ◽  
Strain Sensing ◽  
Irregular Surfaces

Adaptive telescope for confocal photothermal microscopy of irregular surfaces

2021 ◽  
Vol 60 (04) ◽  
Author(s):  
Luis Emiliano Jan ◽  
Facundo Zaldivar Escola ◽  
Nelida Mingolo
Keyword(s):  
Irregular Surfaces ◽  
Photothermal Microscopy

scholarly journals Execution of Plastic Parts Using 3D Scanners and 3D Printers

2018 ◽  
Vol 55 (2) ◽  
pp. 215-218
Author(s):  
Anca Bucuresteanu ◽  
Dan Prodan ◽  
Adrian Motomancea
Keyword(s):  
Organic Materials ◽  
3D Scanning ◽  
Complex Surfaces ◽  
Irregular Surfaces ◽  
Wide Range ◽  
3D Printers ◽  
3D Scanners ◽  
Plastic Parts

In this paper, the authors show a part of research works performed on the use of 3D scanners and 3D printers to execute plastic parts with complex surfaces. 3D scanning allows copying of certain surfaces in our environment, based on existing models. Scanned models may represent various objects, made of a wide range of materials: metals, ceramics, fabrics, plastics, leather, organic materials etc. [1]. This paper shows the results achieved using a scanner and a common and affordable - low-price - printer. 3D scanners and printers allow execution of clones of certain parts with irregular surfaces.

Ultrasound transmission gel as a bolus device for skin irradiation of irregular surfaces: technical note

2010 ◽  
Vol 115 (6) ◽  
pp. 975-982 ◽  
Author(s):  
G. Catalano ◽  
P. Canino ◽  
M. Cassinotti ◽  
S. Pagella ◽  
V. Piazzi ◽  
...  
Keyword(s):  
Technical Note ◽  
Irregular Surfaces ◽  
Skin Irradiation

Scattering of plane elastic waves at rough surfaces. II

1963 ◽  
Vol 59 (1) ◽  
pp. 231-248 ◽  
Author(s):  
Iya Abubakar
Keyword(s):  
Incident Wave ◽  
Elastic Waves ◽  
Rayleigh Waves ◽  
Irregular Surfaces ◽  
Elliptic Orbits ◽  
Incident Plane ◽  
Diffraction Of Elastic Waves ◽  
Axis Of Symmetry ◽  
Point Of Intersection ◽  
Second Wave

AbstractThis is a continuation of (1) on the two-dimensional problem of the diffraction of elastic waves by irregular surfaces. The effect of an irregular surface with an isolated irregularity like a trough or ditch on incident plane harmonic P- and SV-waves is discussed. The maximum depth of the ditch is assumed small compared to the wavelength of the incident wave.It is found that, when either a P- or an SV-wave is incident on such a boundary, besides the specularly reflected P- and SV-waves whose amplitudes are independent of the curvature of the surface there exist scattered waves travelling in various directions. In particular the diffracted zone contains the following second wave-types whose amplitudes are proportional to the depth of the ditch: (i) direct reflected P- and SV-waves, which at large distances appear to diverge from the point of intersection of the axis of symmetry of the ditch and the horizontal plane asymptotic to the boundary if the ratio of the wavelength of the incident wave to the half-width of the ditch is large. If the ratio is small these waves are reflected in the specular directions, (ii) A ‘secondary S-wave’ which finishes as P having travelled most of the way as an SV-wave. Its energy is confined to the neighbourhood of the free surface, (iii) A secondary P-wave which travels along the surface and finally emerges into the medium as an SV-wave at the critical angle for the medium, (iv) Rayleigh waves whose particle motion is in elliptic orbits.

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